This is Cape York Peninsula, the northernmost part of the Australian state of Queensland.
The northernmost tip of mainland Australia is Cape York. It is located on Cape York Peninsula, in Queensland.
The northernmost point of the Coromandel Peninsula, New Zealand is Cape Colville.
The strait north of Australia off Cape York Peninsula (Australia's northernmost point) is Torres Strait. It is around 150 km wide, and separates Cape York Peninsula from Papua New Guinea.
The Yucatan Channel has a width of approximately 217 kilometers (135 miles) from Cape Catoche, the northernmost point of the peninsula and Cape San Antonio, the westernmost point of Cuba.
Cape Checlyuskin
On the mainland it would be Seisia just north of Bamaga on Cape York Peninsula. Alternatively, it would be Thursday Island, a small island community just off the tip of Cape York.
A peninsula is a landform that is surrounded almost entirely by water, but remains connected to a larger land mass. Italy is a peninsula, as is the state of Florida.
Australia's northernmost point is Cape York.
Cape York Peninsula
cape, point, headland
The geographic importance of Cape York is that it is mainland Australia's northernmost point.